Merge pull request #39 from Frugality/expose-category

Category: export from index.js

src/index.js

@@ -2,5 +2,5 @@ import emojiIndex from './utils/emoji-index'
 import store from './utils/store'
 import frequently from './utils/frequently'
 
-export { Picker, Emoji } from './components'
+export { Picker, Emoji, Category } from './components'
 export { emojiIndex, store, frequently }